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89 行
1.8 KiB
89 行
1.8 KiB
var DomUtils = require("domutils"),
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isTag = DomUtils.isTag,
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getParent = DomUtils.getParent,
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getChildren = DomUtils.getChildren,
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getSiblings = DomUtils.getSiblings,
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getName = DomUtils.getName;
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/*
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all available rules
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*/
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module.exports = {
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__proto__: null,
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attribute: require("./attributes.js").compile,
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pseudo: require("./pseudos.js").compile,
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//tags
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tag: function(next, data){
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var name = data.name;
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return function tag(elem){
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return getName(elem) === name && next(elem);
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};
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},
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//traversal
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descendant: function(next, rule, options, context, acceptSelf){
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return function descendant(elem){
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if (acceptSelf && next(elem)) return true;
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var found = false;
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while(!found && (elem = getParent(elem))){
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found = next(elem);
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}
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return found;
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};
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},
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parent: function(next, data, options){
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if(options && options.strict) throw SyntaxError("Parent selector isn't part of CSS3");
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return function parent(elem){
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return getChildren(elem).some(test);
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};
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function test(elem){
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return isTag(elem) && next(elem);
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}
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},
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child: function(next){
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return function child(elem){
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var parent = getParent(elem);
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return !!parent && next(parent);
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};
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},
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sibling: function(next){
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return function sibling(elem){
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var siblings = getSiblings(elem);
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for(var i = 0; i < siblings.length; i++){
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if(isTag(siblings[i])){
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if(siblings[i] === elem) break;
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if(next(siblings[i])) return true;
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}
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}
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return false;
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};
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},
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adjacent: function(next){
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return function adjacent(elem){
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var siblings = getSiblings(elem),
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lastElement;
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for(var i = 0; i < siblings.length; i++){
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if(isTag(siblings[i])){
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if(siblings[i] === elem) break;
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lastElement = siblings[i];
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}
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}
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return !!lastElement && next(lastElement);
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};
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},
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universal: function(next){
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return next;
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}
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};
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